I could, from my skills, virtually fly everything
It would be wise first to be a pilot, before planning a TP career. I know the german AF very well, and there is nearly no chance to be a TP resting on a "plan".
I am just rejected from the fast jet track for 'insurance reasons') prevent me from getting access to the "really interesting" TP flying jobs I would like to do
What do you think, straight into the TP job from kid and pedestrian to fast movers? Oh boy, check your attitude. Why should the AF burn millions to a kid that isn't interested to be a soldier on the military way, only planning a career? You should only join the AF if you want to be at first a commissioned officer, ready to make the military job in the dusty foreign countries. If the AF tells you to go to Osama-land, will you answer them, " No, i'm only ready to be a TP"?

Looking at your words i advice, go on on the bookkeepers way.